Gaseous helium is used as an inert shielding gas in metal arc and laser welding.
在金属电弧和激光焊接中气态氦用作惰性屏蔽气体。
2
In Gaseous state, Numerical Value of Ionization energy measure difficult and easy of metal atom lose electron.
在气相中，金属原子失去电子的难易用电离势数值大小来衡量。
3
Gaseous NF3 containing 0.1% or less active fluorides (calculated as HF) was found to be noncorrosive toward several different parent and welded metal specimens.